package com.gdit.framework.common.util;

import javax.servlet.http.HttpServletRequest;

public class IpTools {
	/**
	 * 获取IP
	 * 
	 * @param request
	 * @return String 2011-12-20 下午09:55:39
	 */
	public static String getIpAddr(HttpServletRequest request) {

		if (request == null) {
			return "";
		}
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}
}
